Axial Fans: Type - DC Tubeaxial Fan; Voltage - Nominal - 24V DC; Power Input - 3.6W; Air Flow - 41.7 CFM; Size - LxW - 80 x 80 mm (3.15 x 3.15"); Size - Depth - 25 mm (1.00"); Noise Level - dB - 33 dB; Bearing - Sleeve Bearing; Material - Housing - Metal; Material - Impeller - Nonmetallic; Voltage Range - 24V DC; Motor - Brushless